Shower head accessory



FIG. 1 is an isometric view of a shower head accessory showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top plan view thereof showing my design. 

The ornamental design for a shower head accessory, as shown and described. 